Lock.



PATBNTED 13:50.29, 190s.

W. K. KMEk l LOCK. APPLICATION FILED MAY 21, 1903.

N0 MODEL.

A 'rroR/VE S UNITED STATES Patented December 29, 1903.

'PATENT FFICE.

LOCK.

SPECIFICATION forming 'part of Letters Patent No. 748,285, datedDecember 29, 1,903. i Application led May 2l, 1905.. Serial No. 158.103.(No model.)

To al?, whom it may con/cern.-

Be it known that I, WALTER KELITA KAYE, a subject ofthe King of GreatBritain and Ireland, whose postal address is South Accoln` modationRoad, Leeds, in the county of York,

England, haveinvented certain new and useful Improvements in andRelating to Locks lic institutions.

for Asylums and other Public Institutions, of which the following is aspecification.

This invention is for improvements in and relating to locks for asyluinsand other pub- Hitherto the chief object in such institutions as regardslocks has been to prevent the possibility of communication by theinmates confined in one ward with those of another' to insure thesafekeeping of the inmates within their respective areasthat is to say,the locks for the most part are `constructed. in such a manner as notonly to lock them in the ordinary manuel', but to check-iock by a secondkey and double check-lock by a third key, a masterkey, the latterbeingin the possession of the principal medical oiicer or other superiorolcer iu charge of the institution. These precautions are deemed wise inview of the object already described. This security, though desirableunder ordinary conditions, is in case, say, of tire an element of dangerto the inmates if the person or persons in charge of thegthree severalkeysare not immediately forthcoming in the instant the fire breaks out.

The object of my invention is in the rst instance not to interferein'any way with the system of check-locking above described, but toconstruct the strikiug-plate of the locks for such institutions in sucha manner as to permit of its instant removal, and thereby allow of theopening of the doors so fitted. By striking-plate I mean a plate whichso long as it is in position and the bolts are shot forms the abutmentfor the bolt and prevents the door from opening. The said removableportion of the striking-plate isso arranged. that pressure upon thesaine will not affect the falling away of the plate when operated. Indescribingone form of my invention iu detail reference is made to theaccompan yi ng sheets of drawings, similar letters indicating similar'parts, in which-f Figure l represents an elevation of a portion of adoor and door-jamb, showing the door closed. Fig. 2 is a side elevationof the striking-plate with one of its sides removed.

Fig. 3 is a plan of the striking-plate. Fig. is an elevation of thestriking-plate, showing the front portion liberated. Figs. 5 and 6 aredetails of the leverL hereinafter referred to.

In carrying out this form of my invention I constructthe casing towhichthe strikingplate A is attached deeper than usual to allow for thereception of the mechanism for holdI ing or releasing suchstriking-plate, such 'cas ing being fitted into the jamb of the door,the lock being of the ordinary construction..

The striking-plate A is hinged to the casing' B by'hinges B' and B2, asshown in Figs. 1

and 3, two hooks C and D being formed on A the inner side ofstriking-plate-A, as shown in Figs. 2, 3, and 4. Attached to the edge ofthe said striking-plate A is what might be termed a small striking-plateE for engaging with the ordinary latch E' of the lock. The inner casingB is cut away, as shown in Fig. 4, at F and F' to allow of the saidhooks C and D passing through the same, also to allow of the bolt F2 andlatch E' of the lock passing through such openings when the locked door.is to be opened.

In the interior. of the casing B and free to move on fulcrum G is alever H, having at its outer end a catch 'J to engage with thebefore-mentioned hook C. Formed Atoward the end of lever H` is aprojection K, which will engage with a projection L ou lever L',fulcrumed at L2 and pressed toward the striking-plate by spring M ofsuitable strength in such a manner that when the lever H is turnedupward on its fulcrum G the projection L will engage with projection Kand at the same time the point J of level' H will rest on projection L,formed ou lever L', as shown in Ifigs. 5, o, and retain the lever l-I.'On the hook Gengaging with projection L3 on lever L' ou closing 'thestriking-plate the lever L' will be forced back and allow the catch J'to fall and engage with hook C.

Engaging Vwith thehook D is a catch N', forming part of lever N andfulcrum'ed at O. Fulcrumed at P is a vertical lever Q, having rollersQand Q2 at each end to engage with the under and upper sides of levers Hand N, said lever Q, having engaging with its lower sides the point ofspring R, as shownwin Fig.

roc

2, stops S and T being provided in casing B, as shown in Fig. 2.

In order to release the striking-plate A in case of emergency, andthereby allowa locked door to be opened, the lever Q is moved, as snownby dotted linesin Fig. 2. This movement can be caused by sliding forwarda rod, such as U, by mechanical, magnetic, or pneu matic means. Thepoint at which the power to operate the rod may be set in motion may bein any part of the building, and there may be more than one of suchpoints, and all the doors in the building may be operated, if desired,from any one point. Each of the switches, taps, levers, or other devicesby which the striking-plates can thus be operated in case of emergencycan conveniently be inclosed in a lockedcase provided with a glassfront, as commonly used for lire-alarms, so that in case of emergencythe glass front can be broken and the striking-plates released withoutthe use of any key. The rod U will beforced against the lower portion oflever Q, thereby turning lever-Q into position, as shown in Fig. 2 indotted lines, causing the catch N on lever N to disengage with hook D onthe striking-plate A, and on spring M .exerting pressure on lever L' thecatch C is forced back, and thereby the hinged striking-plate and thelever H retained in its lifted position. To fasten the door again, thedoor is closed and the striking-plate returned to its original position,where it is held, as before.

Maen

It will be readily understood that other mechanism than thathereinbefore described may be used for the operationof the hingedstriking-plate.

Having now particularly described and ascertained the nature of thisinvention and in.

gagement with the notches, a spring for keeping said lever in a'verticalposition and means for disengagisg said lever Q from the rocking leversto allow said striking-plate to move, substantially as described.'

2. In combination, a. door-lock, a removable striking-plate, lugs onsaid plate having notches therein, rocking levers having hooked endsengaging with said notches and a springcontrolled lever for holding oneof said rocking levers when it is out of engagement with 69'" the lug onthe striking-plate.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

WALTER K. KAYE.

Witnesses:

OLIVE WAUGH, CHAS. GILLIARD.

